The Quanum R/C Snow Ski is made of high strength non-coloured Nylon that wont get brittle in cold weather.. It can be used on variety of planes and comes with a spare spring for left/right conversions.
It is very simple to install with all required hardware included and the specially designed fin ensures straight tracking and less yawing during landing and takeoff. An excellent addition to any .40 or .60 size or larger R/C plane.
These are for tail draggers, not tricycle gear. They are too big and heavy for a PKZ. T-28, unless you have a much larger one. This set weighs almost one pound! You need a smaller set made for tricycle gear. Google Du-Bro, they make a set of park flyer skis.
If you search on full-size ski installation on aircraft you will find the geometry is similar to that shown by the HK picture. The tip of the ski can be only go down - not up.
It seems counter-intuitive to me as well.
I would hope so, these things are huge, and heavy! They are correct in direction they move. If they could pivot up, they would catch the air and put you into a nice spin! Since the have to be set so they are a small amount of positive angle, they want to go down to match the angle of the plane. Nose high on flare, nose down for take-off and faster landings. Just don't point them up too high, plane will fly weird, like flaps on!
I've used these skis on anything from a Multiplex Gemini Bi-plane(foamy) to a Carl Goldberg Eagle 2 (40 size trainer). They work very well, give better "floatation" in powder snow than Dubro skis and come with quality hardware. They should work very well for your application. Good luck!
You should use a dubro ski or a gift card as a rear ski(on tail dragger) if in powder snow.If on packed snow or ice this ski would work I think.I use a gift card on back tail wheel in powder snow, and just tail wheel for packed snow on roads.(Used on EPP FPV plane)
To FPV-NUT. I mounted the skies and tryed them out yesterday. First with the blacke bolt as you suggested, not a good idea. The black bolt has to point forward as the picture shows. The Hobby king picture is right. Just to inform others. Anyway, they are great.
I'm Canadaian we kinda get a little bit of snow here so I think I know what I'm talking about,Sorry your wrong,and either dont own them or are talking to hear yourself talk.With the black bolt forward the skis cant pivot up (only can pivot down),which means if you hit a rock or snow pile they cant go over it and can only dig into the snow..
I've got these skis installed on a .40 size trainer with tricycle landing gear. The main skis, the black bolt is to the rear (preferred). The nose ski, the black bolt is forward. This is only to prevent the ski from pitching up and hitting the prop when flying from rough snow. Bolt forward means that the ski is able to nose in, rotate around, and end upside-down(personal experience). If you want to know about skis and snow, the view from my window is nothing but white Canadian landscape.
What they don't tell you is you must sand or grind a flat spot so the black bolt will not rotate on shaft
so skis will not rotate.I should have said before its a very old trick I thought everybody knew my mistake.
Same as anything you must use a grub screw or bolt on.Otherwise the grubs screw or bolt is pointless.Try my way you wont have any problems and ski will not rotate on axle. Remember grind flat spot on axle not on black lock bolt just to be clear....lol
I put these on my HobbyKing EPP FPV they fit great but the picture is wrong .The black bolt in the picture should point backward not forward because the spring acts like a shock absorber ,you want the ski to pitch up a little to go over ***ps but you never want the ski to pitch down because that would dig snow and stop the plane dead in its tracks.(just a heads up).
I mounted the skies and tryed them out yesterday. First with the blacke bolt as you suggested, not a good idea. The black bolt has to point forward as the picture shows. The Hobby king picture is right. Just to inform others. Anyway, they are great.
Sorry your wrong,and either dont own them or are talking to hear yourself talk.With the black bolt forward the skis cant pivot up (only can pivot down),which means if you hit a rock or snow pile they cant go over it and can only dig into the snow..
Great item... If U want cheaper solution try using coroplast (real estate sign). Its like a plastic cardboard. Simply cut desired size with knife, score a couple times where bend is required at front tip and use renforced tape to hold bend. Remove wheels. I put plane on table tipped slightly tail up and hot glue skiis on. Lightly score coroplast to help glue hold better This adds small bit of uplift to plane but really does not change flight much. Presto great cheap skiis to fly all winter!!!
I know we Americans are idiots, since we refuse to adopt the logical metric system, so for fellow-yanks: these skis are pretty BIG for most models, measuring 10.6" long and 2.6" wide. 91gr isn't all that heavy for a 3-5 foot wingspan plane, but dragging these IS a noticable airfoil...
I wonder if anyone has tried using these with retract struts, to belly-land with the skis closer to the fuselage...?
A friend of mine has been using these with his 1.4 meter electric 3D plane just fine. You shouldn't need a .40 size plane to use these, though I suppose you could use a Dremel or a hacksaw to cut these down to size if you needed something smaller.
Few years ago, I find a cool way to build light skis. I use a 2L pepsi bottle, I draw the shape of a skis about 12 to 15 cm (5-6 inch for my american friends lol) by about 5 cm wide. The trick is to use the round side of the bottle to make the round side of the skis, and then I mold 2 or 3 fiberglass layer, no unmolding agent al all, It's almost unstick by it's self when all is harden ! Then alfer a use s**** part of alu sheet to make the fixture. Try it, it's fun and easy to do !
Sounds great, Pierre. BTW, some of us Americans like the Metric system, even if we have to convert some of the more arcane (to us) conversions. I've always thought it was a mistake that the U.S. didn't commit to metric when they said they would in the 70's.
Yup. I'm completely with you there.
2 in the picture, but it clearly says "ski" (singular). I got my order along with my singular bloody Ski. I only added it because I had 194gramms left on the last order... now I have to make another order... (how will I survive) *o)
and you guys cam out with skis in December ? a bit lat uh? I just ordered those from Dubro, holy cow! I like yours more and I'm gonna order them too, transparent is a good choice, planning to do a 3 cycle version and other sizes?
Note: The skis are sold as individual units, therefore you need to buy two for a tail dragger or three for trike gear models - $26.00 and $36.00 US, plus shipping, respectively. It looks like a nice product, but not the most economical. You can buy Dubro Aluminum skis for about the same price or less.
WOW! Jason. The Quantum skis are ONE HUNDRED TIMES better than those from Dubro* that's amazing, 100 times, eh? Would you care to quantify that obviously grossly exaggerated statement? By making this statement, Jason, youve branded yourself suspect in everything else you write.
Well ok then.. I guess we are on the same page then :) Ps... I have been looking at getting a high wing plane with trike landing gear that can go at IDK... high way speed :). But i am not sure if the little wheels could handle landing in IDK a high way median... But i was thinking that ski's at least on front might do better than a wheel at taking brush and rough grass.. Also would these get chewed up Super fast if you landed on pavement..? Not much snow in texas. :) <3 Eric <3
Are ski more aerodynamic than wheels... My sig wonder is really fast but no landing gear.. the next one i build i would like to instal a landing gear so i can take off the ground if there no one at our field to throw it for me...
It's not likely that skis are more aerodynamic than wheels. They have to be angled up in flight so that the tip doesn't catch in uneven snow and break something. (It's happened.) But I can see that one thing better than Dubro aluminum skis is that nylon should be much more slippery on the snow than aluminum, for easier takeoffs.
I bought 3 of those to fit on my Cessna 182. Because of the chinese new year I used EMS express, wow i received 29 days after purchase (EMS never again).Just late enough to make sure there was no more snow to try them. One of the three was twisted, unrepairable. At first view they look good & solid, but maybe a bit heavy.
Very nice Ski for my Sebart Katana 50E. The size is perfect and springs allow to change the ski angle so you can get very smooth landings and takeoffs in different snow conditions. The only minus is weight - 180g for pair so only four stars!